/Engine/Source/Runtime/Engine/Classes/Engine/PoseWatch.h
Returns true if InLabel is a unique folder label among the children of InFolder, excluding this
bool IsLabelUniqueInParent ( const [FText](API\Runtime\Core\Internationalization\FText) & InLabel, [UPoseWatchFolder](API\Runtime\Engine\Engine\UPoseWatchFolder) * InFolder ) const